Chronic laryngitis is a chronic non-specific inflammation of the larynx. According to the degree and characteristics of the disease, chronic laryngitis is generally classified as chronic simple laryngitis, chronic hypertrophic laryngitis and chronic atrophic laryngitis. The etiology of this disease is not well understood and may be related to the following factors. 1, acute laryngitis repeated attacks or the result of prolonged. 2, excessive use of voice, improper vocalization. It is mostly seen in teachers, salesmen who use their voices excessively and for a long time, and people who speak loudly in a noisy environment for a long time. 3, harmful gases (such as chlorine, ammonia, sulfuric acid, nitric acid and sulfur dioxide, etc.) and long-term stimulation of tobacco, alcohol, dust, etc. 4, rhinitis, sinusitis, chronic tonsillitis, chronic pharyngitis and other adjacent parts of the inflammation directly to the larynx or the stimulation of purulent secretions. Nasal congestion, resulting in breathing through the mouth, so that the pharyngeal mucosa vasodilatation, laryngeal muscle tension fatigue produces inflammation. 5, lung, trachea, bronchial infection, resulting in long-term contact between purulent secretions and the laryngeal mucosa, secondary to chronic laryngitis. 6, systemic diseases, such as heart disease, kidney disease, diabetes, cirrhosis of the liver, rheumatism, etc., so that the vasodilator function is disturbed, the larynx long-term stasis, can be secondary to chronic laryngitis. 7, pharyngeal reflux and Helicobacter pylori infection Some authors believe that reflux of gastric contents into the throat is one of the causes of chronic laryngitis, and retrograde infection of Helicobacter pylori may be related to the occurrence of laryngitis. Pathology】 The laryngeal mucosa is vasodilated and congested, with increased secretion of mucus glands, lymphocytic infiltration, mucosal swelling, and the infiltration may invade deep into the intramyocardial layer of the larynx. Some patients have fibrous tissue hyperplasia and mucosal hypertrophy. In a few patients, the laryngeal mucosa is atrophied, the columnar ciliated epithelium becomes squamous epithelium, and the glands are also atrophied. Clinical manifestations] The common symptoms are: 1, hoarseness: different degrees of hoarseness is the main symptom of the disease, the degree of hoarseness varies. Initially, it is intermittent, but gradually it may become persistent. If the cricoarytenoid joint is involved, the hoarseness may become significant in the morning or after a longer rest of the vocal cords. Generally, the more you use your voice, the more severe the hoarseness becomes. Complete loss of voice is very rare. In most patients, hoarseness is relieved after a period of vocal abstinence, but it will become heavy again when speech increases. 2. Laryngeal discomfort: discomfort, tightness, foreign body sensation, dryness in the throat, and slight pain in the throat when speaking too much. Patients often cough to relieve laryngeal discomfort. 3. Increased secretion in the larynx: Patients often feel mucus adhering to the larynx and need to cough to remove mucus when speaking. 4. Spasmodic cough: seen in atrophic laryngitis, spasmodic coughing is caused by crusting, often with scabs or mucous secretions being removed with coughing. [Examination] According to laryngoscopic examination, there are 3 types as follows: 1. Chronic simple laryngitis: diffuse congestion and redness of the mucosa, symmetrical on both sides. The vocal folds lose their original pearly white color and become light red, and the edges become blunt; mucus adhesion is seen on the surface of the vocal folds, and mucus filaments are often formed between the two sides of the vocal folds. 2, chronic hypertrophic laryngitis: laryngeal mucosa hypertrophy, more obvious in the interarytenoid region. The vocal folds are obviously hypertrophic, and there are gaps in the middle when they come together, showing poor closure. The ventricular zone is often hypertrophic and obscures part of the vocal folds. 3, atrophic laryngitis: the laryngeal mucosa becomes thin, dry, and in severe cases there are crusts on the mucosal surface. The vocal folds are flaccid and weak, and the closure of both sides is incomplete when pronouncing, so the voice leaks air, the voice is hoarse, and it is difficult to speak. In a few patients, the upper trachea also shows the same lesion. In patients with secondary atrophic rhinitis and pharyngitis, atrophy and dryness of the nasal and pharyngeal mucosa can be seen. Diagnosis] The diagnosis can be made based on the patient’s history of long-term laryngeal discomfort and hoarseness and the physical signs seen by laryngoscopy. In addition, nasal, pharyngeal, pulmonary and systemic conditions should be considered to find the relevant pathogenic factors. The symptoms of this disease are similar to those of laryngeal nodules and early laryngeal cancer, so attention should be paid to differentiation. Treatment】 1. Remove the cause: actively treat rhinitis, sinusitis, pharyngitis, lung and systemic diseases, quit smoking, alcohol and voice rest. For those who have improper pronunciation, pronunciation training can be carried out. 2, local treatment: if necessary, use gentamicin and dexamethasone for oxygen drive or ultrasonic nebulized inhalation, once a day, 4-6 times as a course of treatment. Infrared, ultrashort wave or audio electrotherapy can also be used. 3.Chinese medicine: Huang’s sound pills and golden voice clearing pills can be used. 4.Anti-reflux treatment: for some people with pharyngeal reflux, use proton pump inhibitors, etc. 5.Atrophic laryngitis: the cause should be actively searched for and treated etiologically. Iodine-containing laryngeal tablets and oral vitamins A, E, B2, etc., which have the effect of slightly stimulating increased secretion of glands, can be applied.